Merge #3388

3388: Remove inlay hint in diff views r=matklad a=vbfox

If the left side of a diff view that contain the old version of the file apply inlays they are misplaced and produce a weird display:

![image](https://user-images.githubusercontent.com/131878/75628802-b1ac1900-5bdc-11ea-8c26-6722d8e38371.png)

After the change:

![image](https://user-images.githubusercontent.com/131878/75628831-e91ac580-5bdc-11ea-9039-c6b4ffbdb2be.png)

The detection is done by blacklisting the url schemes used by git and subversion scm extensions, whitelisting `file` is also possible but neither is perfect as VSCode now support both pluggable scm extensions and pluggable remote filesystems. But I suspect that the list of scm extensions is more easily manageable.

**Note**: I can rebase on #3378 if needed as it touches the same lines of code

Co-authored-by: Julien Roncaglia <[email protected]>

1 files changed, 8 insertions, 1 deletions

diff --git a/editors/code/src/ctx.ts b/editors/code/src/ctx.ts
index 43540e0d8..b4e983a0c 100644
--- a/editors/code/src/ctx.ts
+++ b/editors/code/src/ctx.ts
@@ -3,6 +3,7 @@ import * as lc from 'vscode-languageclient';
 
 import { Config } from './config';
 import { createClient } from './client';
+import { isRustDocument } from './util';
 
 export class Ctx {
     private constructor(
@@ -23,11 +24,17 @@ export class Ctx {
 
     get activeRustEditor(): vscode.TextEditor | undefined {
         const editor = vscode.window.activeTextEditor;
-        return editor && editor.document.languageId === 'rust'
+        return editor && isRustDocument(editor.document)
             ? editor
             : undefined;
     }
 
+    get visibleRustEditors(): vscode.TextEditor[] {
+        return vscode.window.visibleTextEditors.filter(
+            editor => isRustDocument(editor.document),
+        );
+    }
+
     registerCommand(name: string, factory: (ctx: Ctx) => Cmd) {
         const fullName = `rust-analyzer.${name}`;
         const cmd = factory(this);